// vue.config.js
'use strict';
const path = require('path');
const defaultSettings = require('./settings.js');

function resolve(dir) {
  return path.join(__dirname, dir);
}

const name = defaultSettings.name || 'xxx'; // page title

module.exports = {
  publicPath: './',
  outputDir: 'dist',
  assetsDir: 'static',
  lintOnSave: true,
  productionSourceMap: false,
  // 全局scss变量及方法
  css: {
    loaderOptions: {
      sass: {
        prependData: `@import "@/assets/styles/variable.scss";`
      }
    }
  },
  devServer: {
    host: '127.0.0.1',
    port: 9092,
    open: true,
    proxy: {
      '/protal': {
        target: `http://121.199.12.118/`,
        changeOrigin: true,
        pathRewrite: {
          '^/protal': '/protal'
        }
      },
      '/admin': {
        target: `http://121.199.12.118/`,
        changeOrigin: true,
        pathRewrite: {
          '^/admin': '/admin'
        }
      }
    }
    // overlay: {
    //   warnings: false,
    //   errors: true
    // }
  },
  configureWebpack: {
    // provide the app's title in webpack's name field, so that
    // it can be accessed in index.html to inject the correct title.
    name: name,
    resolve: {
      alias: {
        '@': resolve('src')
      }
    }
  },
  chainWebpack(config) {
    // config.entry('main').add('babel-polyfill'); // main是入口js文件
    config.module
      .rule('vue')
      .use('vue-loader')
      .loader('vue-loader')
      .tap(options => {
        // 模版中 HTML 标签之间的空格将会被忽略
        options.compilerOptions.preserveWhitespace = true;
        return options;
      })
      .end();

    config.when(process.env.NODE_ENV !== 'development', config => {
      // config
      //   .plugin('ScriptExtHtmlWebpackPlugin')
      //   .after('html')
      //   .use('script-ext-html-webpack-plugin', [
      //     {
      //       // `runtime` must same as runtimeChunk name. default is `runtime`
      //       inline: /runtime\..*\.js$/
      //     }
      //   ])
      //   .end();
      config.optimization.splitChunks({
        chunks: 'all',
        cacheGroups: {
          libs: {
            name: 'chunk-libs',
            test: /[\\/]node_modules[\\/]/,
            priority: 10,
            chunks: 'initial' // only package third parties that are initially dependent
          },
          elementUI: {
            name: 'chunk-elementUI', // split elementUI into a single package
            priority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or app
            test: /[\\/]node_modules[\\/]_?element-ui(.*)/ // in order to adapt to cnpm
          },
          commons: {
            name: 'chunk-commons',
            test: resolve('src/components'), // can customize your rules
            minChunks: 3, //  minimum common number
            priority: 5,
            reuseExistingChunk: true
          }
        }
      });
      config.optimization.runtimeChunk('single');
    });
  }
};
